Power shovel



March 10, 1925.

P. BURKE POWER SHOVEL NVENTOR.

ATTORNEYS March 10. 1925.

P. BURKE rowan suovm,

Origixial Filed Dec. 18, 1922 2 Sheets-Sheet 2 INVENTOR. Ewe flan/Kn.

A TTORNEY.

Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

PAUL BURKE, OF GREEN BAY, WISCONSIN, ASSIGNOR TO NORTHWEST ENGINEERING COMPANY, OF GREEN BAY, WISCONSIN, A CORPORATION OF WISCONSIN.

POWER SHOVEL.

Original application filed December 18, 1922, Serial No. 607,510. Divided and this appliiation filed March 14, 1924. Serial No. 899,319.

I To all whom it may concern:

Be it known that I, PAUL BURKE, a citizen of the United States of America, and resident of Green Bay. in the county of Brown and State of Wisconsin, have invented new and useful Improvements in Power Shovels, of which the following is a description, reference being had to the accompanying drawings, which are a part 1 of this specification.

This invention relates to power shovels, and more particularly to that type of shovel in which the hoisting cable is used to actuate the thrusting mechanism.

The object of the invention is to improve andsimplify power shovels of the ropethrusting type and to provide for the thrusting of the dipper handle without the use of ear mechanism, or rack and pinions, 29 or auxiliary driving .apparatus of any kind.

A further object of the invention is to' provide a power shovel of the rope-thrusting I type in which the hoisting rope is also used to thrust the dipper handle outwardly and is directly associated therewith, and in which a separately controlled cable is used 'to retract the dipper handle.

This. application is a division from my copending application Serial No. 607,510,

filed December 18, 1922.

' The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a side elevation view of a power shovel mechanism embodying the invention; Fig. 2 is a .plan view thereof.

' In the drawings the numeral 4 designates a boom, which may be of any suitable construction, vertically pivotally. attached at its lower end to the rotating base 5 of the machine, which base is of well known construction. A hoisting drum 6 and an auxiliary drum 7 are mounted on the base in an prime mover, not shown, on the base. The drums 6 and 7 may be of any well. known construction equipped with clutches and brakes to control their operation. The boom is adapted to be raised or lowered and held in various positions of vertical adjustment by any well known means, such as a cable 8 connecting pulleys 9.211; the outer end of the suitable manner and driven from a' the handle is mountedto slide between the adjacent saddle block and a flanged roller 15 on the shipper shaft. A two-part drum or sheave 16 is preferably journalled on the shipper shaft between the rollers 15. Y The di peror shovel 17 may be of any suitab e construction and is mounted, as usual,- at the lower end of the dipper handle.

The hoisting cable 18 is dead-ended on the drum 6, passes therefrom beneath a gulde pulley 19 and over a pulley 20 at the outer end of the boom, then around a padlock sheave 21 carried by the dipper, then once or more times around a drum 22, thencerearwardl and over the sheave 16 on the shipper' s aft 11, and is dead-ended at 25 near the upper end of the dipper-stick 10. A cable 26 secured to and wound upon the drum 7 passes overa sheave 27 conveniently formed as a part of the drum, 16, and is dead-ended near the dipper, as at 28.

With the construction above described, when? the drum 7 is reventedfrom turning, by its brake, there y holding the line or cable 26, and the line 18 is pulled in, the dipper moves approximately in the arc of a circle of which the shipper shaft is the center. If it is desired to crowd farther into the bank or to move the dipper farther out, as in loadings wagon, the braking effect on line 26 is released slightly so as to allow cable 26 to pay out and cable 18 is thrusting movement of the dipper an its stick may be effected. Furthermore, since the line 18 which effects thethrust is ac tuated by the hoist, a crowdin effect equal to the full driving force of the engine is secured.

It will be noted that the thrusting action on the dipper is proportional to the load upon the dipper weight of the material it encounters during digging.

I desire it to be understood that this invention is not to be limited to any specilic form or arrangement of parts exce t in so far as such limitations are specific claims.

Vhat I claim as my invention is: 1. In an excavating shovel, the combination with a supporting boom, of a dipper and diper handle mounted thereonto move bodily dipper hoisting-and-thrusting cable associated with said'dipper and dipper handle and acting directly thereon principally lengthwise of said handle in all its positions for crowding the dipper into the material to be excavated, and means distinct from said cable for moving said dipper inwardly.

2. In an excavating shovel, the combination with a supporting boom, of a dipper and dipper handle, a swinging support pivotally connected to theboonf and in which the dipper handle reciprocates and which it swings, a dipper-hoisting-andthrusting cable associated with said dipper and dipper handle and acting directly thereon principally lengthwise of said handle in all its positions for crowding the dipper into the material to be excavated, and means distinct from said cable for moving said dipper inwardly.

3. In an excavating shovel, the combination with a supporting boom, of a dipper and its handle, a swinging support pivotally connected to the boom and in which the dipper handle reciprocates and with which it swings, a dip er-hoisting a-nd-thrusting cable connected with the dipper and its handle and acting directly thereon principally I lengthwise of said handle in all its positions for crowding the dipper into the material to be excavated, and a separately controlled cable for retracting the dipper.

4. In an excavating shovel, the combination with a-supporting boom, of a dipper and dip er handle mounted thereon to move lengthwise and swing with respect thereto, a dipper-hoisting-and-thrusting cable associated with said dipper and dipper handle and acting directly thereon for crowding the dipper into the material to be excavated and having a multi-part hoisting line portion betweenthe dipper and the boom, and means distinct from said cable for moving said dipper handle inwardly.

' 5. In an excavating shovel, the combination with a supporting boom, of a dipper and its handle, a shipper shaft, a swinging support pivotally mounted on said shaft and in which the dipper handle reciprocates and with which it swings, a dipper-hoisting-anddue to the resistance and in the engthwise and swing with respect thereto, a

with

thrusting cable connected to the dipper and its handle and acting directly thereon 'for crowding the dipper into the material to be excavated, guide means on said shipper shaft about which a portion of said cable runs, said guide means disposing the run of the cable between it and the dipper handle otal support on said boom for slidably receiving said handle, a dipper hoisting cable connected with said dipper and having a portion extending between said support and the inner end of said handle to shift said handle outwardly and means for shifting said handle inwardly.

7. In a power shovel the combination of a boom, a dipper and dipper handle, a pivotal support on said boom forslidably receiving, said handle, a dipper hoisting cable connected with said dipper and having a portion extending between the axis of said support and the inner'end of said handle to shift said handle outwardly, and means for shifting said handle inwardly.

8. In a ,power shovel the combination of a boom, a dipper and dipper handle mount ed thereon for swinging and bodily length- Wise shifting movements, a dipper hoisting I cable operativel associated with the outer end of said han le for raising and lowering said dipper and with the inner end of said handle at a fixed point thereon for shifting said handle outwardly only, and means distinct from said cable for controlling such shifting movement and for shifting said handle inwardly.

9. In a' ower shovel the combinationof a boom, a dlpper and dipper handle mounted thereon for swinging and bodily lengthwise shifting movements, a dipper hoisting'cable operatively associated with the outer end of said handle'for raising and lowering said dipper and with the inner end of said handle at a fixed point thereon for shifting said handle outwardly only, and means including a separately controlled cable operatively associated with the outer end of said dipper handle for controlling such shifting movement and for shifting said handle inwardly.

10. In a power shovel the combination with a boom, a dipper and dipper handle mounted thereon for swinging and bodily lengthwise shifting movements, a dipper hoisting cable operatively associated with said dipper and dipper handle at a fixed point thereon to swing said dipper'and diphandle and at another'fixed point thereon to shift said dipper and dipper handle in movement and for shifting said dipper an dipper handle in'the opposite direction.

11. In a power shovel the combination of a boom, a dipper and dip er handle mounted thereon for swinging an bodily lengthwise shifting movements, a dipper hoisting cable operatively associated with said dipper and dipper handle at a fixed point thereon to swing said dip er and dipper handle and at another fixer? point thereon to shi said dipper and dip er handle outwardly only, and a second ans 0 eratively associated with said dipper and dipper handle for controlling such shifting movementv and for shifting said dipper and dipper handle inwardly;

12. In a ower shovel, the combination 015 a boom, a ipper andv dipper handle, a pivotal support on said boom 1n which said handle reciprocates and with which it swings, a shipper shaft, sheaves on said shaft, a retracting cable passing over one of said sheaves and operatively connected to the dipper and dipper handle at a fixed point to retract the dipper and. control outward movement of said handle, a hoisting drum, a pair of sheaves on the outer end portion of the boom, a padlock sheave on the dipper handle, and a cable passing-from said drum over. one of said sheavesson the outer end of said boom and beneath said padlock separately controlled cable sheave and over the other sheave on the outer'end ofthe boom, over the other sheave on said shaft andoperatively connected to the upper end portion of said dipper handle at a fixed point thereon whereby to hoist the dipper and move it outwardly. v

13. In a power shovel, the combination of a boom, a d pperand dipper handle mounted thereon to swing and shift bodily lengthwise with respect thereto, sheaves at the outer portion of the boom, a hoisting sheave on the di per, adipper-hoisting-and-thruding cable iaving engagement with said handle and actin lengthwise thereof for thrusting. -it outwar ly and running over said sheaves on the boom with a portion. between said sheaves moving on said hoisting sheave, and a separately controlled cable for controlling the outward shifting movement and for re tracting the dipper.

14. In a power shovel, the combination of a boom, a dipper and dipper handle mounted thereon to swing and shift bodily lengthwise with respect thereto, a pan of separately controlled operating cables re spectively connected to the lower and upper end ortions of the dip or handle for controlhng the lengthwise s ifting of said handle, the cable connected to the upper. end portioniof said handle also having-ahoisting connection between the boom and the dipper.

In testimony whereof, "I aflixr i my signature. v

' PAUL BURKE 

